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Article

An Event-Based Inventory Approach in Landslide Hazard Assessment: The Case of the Skolis Mountain, Northwest Peloponnese, Greece

1
Department of Geology, Division of General, Marine Geology and Geodynamics, University of Patras, 26500 Patras, Greece
2
Department of Geology, Division of Applied Geology and Geophysics, University of Patras, 26504 Patras, Greece
*
Author to whom correspondence should be addressed.
ISPRS Int. J. Geo-Inf. 2020, 9(7), 457; https://0-doi-org.brum.beds.ac.uk/10.3390/ijgi9070457
Received: 19 June 2020 / Revised: 15 July 2020 / Accepted: 17 July 2020 / Published: 20 July 2020
Assessment of landslide hazard across mountains is imperative for public safety. Pre- and post-earthquake landslide mapping envisage that landslides show significant size changes during earthquake activity. One of the purposes of earthquake-induced landslide investigation is to determine the landslide state and geometry and draw conclusions on their mobility. This study was based on remote sensing data that covered 72 years, and focused on the west slopes of the Skolis Mountains, in the northwest Peloponnese. On 8 June 2008, during the strong Movri Mountain earthquake (Mw = 6.4), we mapped the extremely abundant landslide occurrence. Historical seismicity and remote sensing data indicate that the Skolis Mountain west slope is repeatedly affected by landslides. The impact of the earthquakes was based on the estimation of Arias intensity in the study area. We recognized that 89 landslides developed over the last 72 years. These landslides increased their width (W), called herein as inflation or their length (L), termed as enlargement. Length and width changes were used to describe their aspect ratio (L/W). Based on the aspect ratio, the 89 landslides were classified into three types: I, J, and Δ. Taluses, developed at the base of the slope and belonging to the J- and Δ-landslide types, are supplied by narrow or irregular channels. During the earthquakes, the landslide channels migrated upward and downward, outlining the mobility of the earthquake-induced landslides. Landslide mobility was defined by the reach angle. The reach angle is the arctangent of the landslide’s height to length ratio. Furthermore, we analyzed the present slope stability across the Skolis Mountain by using the landslide density (LD), landslide area percentage (LAP), and landslide frequency (LF). All these parameters were used to evaluate the spatial and temporal landslide distribution and evolution with the earthquake activity. These results can be considered as a powerful tool for earthquake-induced landslide disaster mitigation View Full-Text
Keywords: earthquake-induced landslides; inventory; remote sensing; aerial photographs; arias intensity; Greece earthquake-induced landslides; inventory; remote sensing; aerial photographs; arias intensity; Greece
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MDPI and ACS Style

Litoseliti, A.; Koukouvelas, I.K.; Nikolakopoulos, K.G.; Zygouri, V. An Event-Based Inventory Approach in Landslide Hazard Assessment: The Case of the Skolis Mountain, Northwest Peloponnese, Greece. ISPRS Int. J. Geo-Inf. 2020, 9, 457. https://0-doi-org.brum.beds.ac.uk/10.3390/ijgi9070457

AMA Style

Litoseliti A, Koukouvelas IK, Nikolakopoulos KG, Zygouri V. An Event-Based Inventory Approach in Landslide Hazard Assessment: The Case of the Skolis Mountain, Northwest Peloponnese, Greece. ISPRS International Journal of Geo-Information. 2020; 9(7):457. https://0-doi-org.brum.beds.ac.uk/10.3390/ijgi9070457

Chicago/Turabian Style

Litoseliti, Aspasia, Ioannis K. Koukouvelas, Konstantinos G. Nikolakopoulos, and Vasiliki Zygouri. 2020. "An Event-Based Inventory Approach in Landslide Hazard Assessment: The Case of the Skolis Mountain, Northwest Peloponnese, Greece" ISPRS International Journal of Geo-Information 9, no. 7: 457. https://0-doi-org.brum.beds.ac.uk/10.3390/ijgi9070457

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